@Override
 public void serialize(BserWriter writer) throws IOException {
   if (this.groupPeer == null) {
     throw new IOException();
   }
   writer.writeObject(1, this.groupPeer);
   writer.writeLong(4, this.rid);
   if (this.user == null) {
     throw new IOException();
   }
   writer.writeObject(3, this.user);
 }
        @Override
        protected void perform(BserWriter writer) throws IOException {
          writer.writeInt(1, 1);
          writer.writeInt(1, 2);
          writer.writeInt(1, 3);
          writer.writeInt(1, 4);
          writer.writeInt(1, 5);

          writer.writeInt(2, 6);

          writer.writeBytes(3, new byte[0]);
          writer.writeBytes(3, new byte[0]);

          writer.writeLongFixed(4, 0);
          writer.writeIntFixed(5, 0);

          writer.writeString(6, "???");

          writer.writeBool(7, true);
          writer.writeBool(7, false);

          writer.writeDouble(8, 0);

          writer.writeLong(9, 0);

          writer.writeObject(10, new EmptyBserObj());

          List<EmptyBserObj> objs = new ArrayList<EmptyBserObj>();
          objs.add(new EmptyBserObj());
          writer.writeRepeatedObj(11, objs);
        }
 @Override
 public void serialize(BserWriter writer) throws IOException {
   writer.writeInt(1, this.groupId);
   if (this.ext != null) {
     writer.writeObject(2, this.ext);
   }
 }
 @Override
 public void serialize(BserWriter writer) throws IOException {
   if (this.peer == null) {
     throw new IOException();
   }
   writer.writeObject(1, this.peer);
 }
 @Override
 public void serialize(BserWriter writer) throws IOException {
   if (this.peer == null) {
     throw new IOException();
   }
   writer.writeObject(1, this.peer);
   writer.writeLong(2, this.rid);
   writer.writeRepeatedObj(3, this.reactions);
 }
 @Override
 public void serialize(BserWriter writer) throws IOException {
   if (this.groupPeer == null) {
     throw new IOException();
   }
   writer.writeObject(1, this.groupPeer);
   writer.writeLong(2, this.rid);
   for (ApiUpdateOptimization i : this.optimizations) {
     writer.writeInt(3, i.getValue());
   }
 }